GPG Hangs When Private Keys are Accessed

I like to sign my git commits with my PGP key, so I was quite alarmed when I went to git commit -S but instead of prompting for my PGP key passphrase, git just started hanging. I haven't made a change to my GPG setup in several months and have made many commits since then with no problem. Additionally, when I attempt to view my private keys with gpg -K, gpg hangs. However, when I run gpg -k to view my public keys, it returns the list like normal. Hopefully someone will have some idea of what is causing this problem and how to fix it.